<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
    <template  id="x-app">
        <h2>{{counter}}</h2>
        <button @click='increment'>+1</button>
        <button @click='decrement'>-1</button>
    </template>
    
    <script src="../vuejs/vue.js"></script>
    <script>
        Vue.createApp({
            template:`#x-app`,
            data:function(){
                return {
                    counter:100,
                }
            },
            methods:{
                increment(){
                    this.counter++
                },
                decrement(){
                    this.counter--
                }
            }
        }).mount('#app')
    </script>
</body>
</html>